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Full Discussion: How to change the file modification time of a file on nfs mount point
Top Forums UNIX for Dummies Questions & Answers How to change the file modification time of a file on nfs mount point Post 302213860 by ggr on Friday 11th of July 2008 07:11:38 AM
Old 07-11-2008
Touch is a built in UNIX command.

To call it from within a C program, you have to use "system" function

system ("/usr/bin/touch /path/file-name") ;

Syntax of Touch:
touch [-acm] [-t [[CC]YY]MMDDhhmm[.SS]] file...

Please see the man page for touch for more details.

To answer if you can modify the time stamp on an NFS mounted File: It depends on your access permission. If you are able to write to that file over NFS, yes, you can change the access time.

-GGR

 

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LEARN ABOUT SUNOS

touch

touch(1B)					     SunOS/BSD Compatibility Package Commands						 touch(1B)

NAME

       touch - change file access and modification times

SYNOPSIS

       /usr/ucb/touch [-acfm] file...

DESCRIPTION

       touch sets the access and modification times of each file to the current time. file is created if it does not already exist.

OPTIONS

       -a	Change the access time of file. Do not change the modification time unless -m is also specified.

       -c	Do not create file if it does not exist.

       -f	Attempt to force the touch in spite of read and write permissions on file.

       -m	Change the modification time of file. Do not change the access time unless -a is also specified.

USAGE

       See largefile(5) for the description of the behavior of touch when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

EXIT STATUS

       The following exit values are returned:

       0	touch executed successfully and all requested changes were made.

       >0	An error occurred. touch returns the number of files for which the times could not be successfully modified.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       touch(1), attributes(5), largefile(5)

SunOS 5.10							    26 Oct 1995 							 touch(1B)
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